1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "src/shared_lib/stream_writer.h"
18
19 #include <algorithm>
20
21 #include "perfetto/base/compiler.h"
22 #include "perfetto/protozero/contiguous_memory_range.h"
23 #include "perfetto/protozero/scattered_stream_writer.h"
24 #include "perfetto/public/abi/stream_writer_abi.h"
25
PerfettoStreamWriterUpdateWritePtr(struct PerfettoStreamWriter * w)26 void PerfettoStreamWriterUpdateWritePtr(struct PerfettoStreamWriter* w) {
27 auto* sw = reinterpret_cast<protozero::ScatteredStreamWriter*>(w->impl);
28 sw->set_write_ptr(w->write_ptr);
29 }
30
PerfettoStreamWriterNewChunk(struct PerfettoStreamWriter * w)31 void PerfettoStreamWriterNewChunk(struct PerfettoStreamWriter* w) {
32 auto* sw = reinterpret_cast<protozero::ScatteredStreamWriter*>(w->impl);
33 sw->set_write_ptr(w->write_ptr);
34 sw->Extend();
35 perfetto::UpdateStreamWriter(*sw, w);
36 }
37
PerfettoStreamWriterAnnotatePatch(struct PerfettoStreamWriter * w,uint8_t * patch_addr)38 uint8_t* PerfettoStreamWriterAnnotatePatch(struct PerfettoStreamWriter* w,
39 uint8_t* patch_addr) {
40 auto* sw = reinterpret_cast<protozero::ScatteredStreamWriter*>(w->impl);
41 static_assert(PERFETTO_STREAM_WRITER_PATCH_SIZE ==
42 protozero::ScatteredStreamWriter::Delegate::kPatchSize,
43 "Size mismatch");
44 memset(patch_addr, 0, PERFETTO_STREAM_WRITER_PATCH_SIZE);
45 return sw->AnnotatePatch(patch_addr);
46 }
47
PerfettoStreamWriterAppendBytesSlowpath(struct PerfettoStreamWriter * w,const uint8_t * src,size_t size)48 void PerfettoStreamWriterAppendBytesSlowpath(struct PerfettoStreamWriter* w,
49 const uint8_t* src,
50 size_t size) {
51 auto* sw = reinterpret_cast<protozero::ScatteredStreamWriter*>(w->impl);
52 sw->set_write_ptr(w->write_ptr);
53 sw->WriteBytesSlowPath(src, size);
54 perfetto::UpdateStreamWriter(*sw, w);
55 }
56
PerfettoStreamWriterReserveBytesSlowpath(struct PerfettoStreamWriter * w,size_t size)57 void PerfettoStreamWriterReserveBytesSlowpath(struct PerfettoStreamWriter* w,
58 size_t size) {
59 auto* sw = reinterpret_cast<protozero::ScatteredStreamWriter*>(w->impl);
60 sw->set_write_ptr(w->write_ptr);
61 sw->ReserveBytes(size);
62 perfetto::UpdateStreamWriter(*sw, w);
63 }
64